Tartini is a program designed as a practical music analysis tool for singers
and instrumentalists.
Just plug in a microphone and instantly your computer will give
real-time feedback including:-

Accurate pitch contours for visualising intonation, vibrato shape,
tuning or just which note is being played

Loudness graphs, to help analyse dynamics

Harmonic structure of a note describing timbre

The program is named after the violinist and composer Giuseppe Tartini. In 1714, he discovered that if two related notes were played simultaneously on a violin, a third sound could be heard. The frequency of the third sound is the difference in frequencies of the two original notes. Tartini taught his students that unless they could hear the third sound, they were playing out of tune. Thus we see him as an early example of someone trying to apply scientific principles to understanding and improving musical technique.